发明名称 |
METHOD OF MANUFACTURING COPPERRSUBSTITUTED RARE EARTH COBALT PERMANENT MAGNET |
摘要 |
PURPOSE:To reduce the characteristic deterioration of a copper-substituted rare earth cobalt permanent magnet and improve the productivity thereof by sintering powder pressure-molded in magnetic field at relatively low temperature at first step to thereby density it to form a preliminary sintered magnet and again sintering it at higher temperature than the first step at a second step. CONSTITUTION:After copper-substituted rare earth metal cobalt is pulverized to powder having predetermined mean grain size, the powder is pressure-molded in predetermined magnetic field. The powder is sintered on the same day as the pressure-molding day at a first step so that the sintering specific weight rho(g/cm<3>) is 7.0<=rho<=8.0 to thus form a preliminary sintered magnet. The sintered magnet is again sintered at higher temperature than the first step for predetermined time at a second step on the later day, and quenched, thereby manufacturing a permanent magnet having less magnetic characteristic deterioration. |
申请公布号 |
JPS5596616(A) |
申请公布日期 |
1980.07.23 |
申请号 |
JP19790004380 |
申请日期 |
1979.01.17 |
申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
SATOMI MITSUO;YOSHINO TAKESHI;SAKINOU HARUFUMI;HIROTA EIICHI |
分类号 |
C22C1/04;B22F3/10;C22F1/10;H01F1/08;H01F7/02;H01F41/02 |
主分类号 |
C22C1/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|